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RE: Thermal Resistance

Thread Summary

The user requested thermal resistance values for a device, focusing on junction to ambient, junction to board, and junction to case. The final answer indicates that the junction to case thermal resistance (100°C/W and 110°C/W) is the most significant, with other terms being ~100 times higher. The maximum allowable operating junction temperature is 135°C.
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Category: Datasheet/Specs
Product Number: HMC8038LP4CE, HMC8038

Kindly Provide thermal resistance

1) Junction to ambient

2) Junction to board

3) Junction to case

4) Maximum Allowable Operating junction temperature

  • Junction to case temperature (junction to exposed paddle) dominates the 99% + of the thermal dissipation. Thus you may use 100C/W and 110C/W thermal values...Other terms are insignificant and the thermal resistance is ~100 times higher. Maximum channel temperature is 135C

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